Change-speed gear.



No. 675,669. Patented .lune 4, 190|. NRLING.

CHANGE SPEED GEAR.

(Application filed Mar. 8, 1900.] (No Model.) 4 Sheets-Shen l.

mmm Imm Patented lune 4, l90l. 0. NORLING.

No. 675,669. Patented lune 4, |901. o. nomma.

CHANGE SPEED GEAR.

(Application filed Mar. 8, 1900.) (No Model.)

4 Sheets-Sheet 3.

Patentad lune 4, l90l.

4 Sheets-Sheet 4,

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(No Modal.)

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UNiThn STATES PATENT OFFICE.

OSCAR NORLING, OF AURORA, LLINOIS, ASSIGNOR TO AURORA AUTOMATICMACHINERY COMPANY, OF SAME PLACE.

CHANGE-SPEED GEAR.

SEQECIFIICATICN forming part of Letters Patent No. 675,669, dated June4, 1901. `./ipplication filed March 8, 1900. Serial No. 7,793. (Nomodel.)

To @ZZ whom it 71mg concern:

Be it known that i, OSCAR NORLING, of Aurora, in the county of Kane andState of lllinois, have invented certain new and useful Improvements inChange-Speed Gear; and I do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,

io which form a part of this specification.

This invention relates to an improvement in change-speed gears, the samebeing intended more particularly for use in driving the feed mechanismof an automatic metal-workr5 ing machine, but being adapted also for usein other cases where such devices are applicable.

The invention consists in the matters hereinafter described, and pointedout in the apzo pended claims.

In the accompanying drawings, illustrating one practical embodiment ofmy invention, Figure l is a plan view of a mechanism enibodyingmyinvention. Fig. 2 is a longitudinal section taken on a plane passinghorizontally through Vthe central axis of the main shaft of the device.Fig. 3 is a detail vertical section taken on line 3 3 of Fig. 2. Fig. eis a detail section taken on line Ll 4 of Fig.

3o 2. Fig. 5 is a detail section taken on line 5 5 of Fig. 2. Fig. 6 isa detail section taken on line 6 G of Fig. 2; Fig. 7, a detailcross-section taken on line 7 7 of Fig. 2. Fig. S is a detail section ofthe parts shown in Fig. 7, taken on line 8 8 of said Fig. 7. Fig. 9 is adetail plan view with parts broken away, illustrating more clearly theconstruction of the parts shown in Figs. 7 and S. Fig. lO is a detailplan view of the end of the sleeve shown in 4o said Figs. 7, S, and 9.Fig. ll is a detail view of the spring-ring which is shown in said Figs.7, S, and 9. Fig. l? is a face View of one of the bevel-gears shown inFigs. l and 2. Fig. 13 is a cross-sectional view of the other of saidbevel-gears, showing the shaft on which said gear-wheel is mounted inside elevation. Fig. li is a face view of one end of the clutchsleeveshown in Fig. 2. Fig. l5 is a detail sectional view of the opposite endof said 5o clutch-sleeve. Fig. 1G is a detail sectional view of that oneof the clutch members which is shown in Fig. 2 as attached to the sleevewhich surrounds the main shaft. Fig'. 17 is a similar view of the clutchmember shown in Fig. 2 as attached to the main shaft.

As illustrated in said drawings, A indicates the belt-pulley, throughthe medium of which power is applied to the change-speed gearillustrated and which is driven by a drivingbelt from any proper oravailable source of 6o power.

B indicates a shaft to be driven alternately at uniform and variablespeeds and which as illustrated in the present case is the shaft whichdrives the speed mechanism of an automatic metal- Working machine, saidmachine being of that class in which several different cutting-tools areadapted to operate on a blank and in which it is desired that said toolshould be fed or advanced at differ- 7o ent speeds, according to thecharacter of the work to be done by said tool, and in which also thefeed device has a reverse or backward movement to retract thecutting-tool, the device illustrated being adapted to give alternateperiods of fast movement and variable slower movement to said shaft B,which turns always in one direction.

C indicates the main supporting shaft or spindle upon which theprincipal operative 8o parts of the device are mounted. This shaft isjournaled at one end in a bracket D and at its opposite end in a bracketD', said brackets being supported in any suitable manner, preferably bybeing` attached to the frame of the machine on which the device ismounted. Said machine-frame as shown in the accompanying drawings isindicated by D5.

E indicates a sleeve or hollow shaft which is mounted on the shaft C, asherein shown 9o near the right-hand end of said shaft, and F F" are twobeveled gear-Wheels, one of which is mounted on the sleeve E and theother of which is mounted on the shaft C at its end nearest the bearingD. The said g5 bevel-gears F and F' are arranged to face each other at ashort distance apart, and said gears are adapted to interrnesh with agearpinion A', which is mounted on the drivingpulley A, whichdriving-pulley has bearing los upon a horizontal bearing-stud a, securedto the bracket D and the axis of which is arranged radially with respectto the shaft C. Upon the shaft C, between the gears F F', is

mounted a slidable clutch-sleeve G, which is free both to rotate andmove endwise on said shaft. Said sleeve is connected with an oscillatoryactuating-lever H through the medium of a ring g, which engages a groovein the central part of the sleeve and has pivotal connection by means ofa pivot 71J with the end of the actuating-lever H. The sleeve G is forthe purpose of establishing operative connection between thebevel-gear'F and the shaft C or between the bevel-gear F and the sleeveE, on which the latter gear is mounted, said gears being constructed toturn freely on said shaft and sleeve when not connected therewith bymeans of the clutch device. Said clutch-sleeve and the opposing faces ofthe gears F and F are provided with clutch members or teeth arranged toface outwardly, so as to establish driving connection between said gearsand clutch members F2 F3, which are secured to the end of the sleeve Eand the shaft C within or adjacent to the hubs of the gear-Wheels F F.Said clutch members F2 F3 have the form of rings provided with a seriesof clutch-teeth ff, which engage corresponding teeth g g', formed onclutch-rings G G2, inserted in annular recesses formed in the ends ofthis clutch-sleeve, said rings bein'g secured in the ends of saidclutch-sleeve by screw-threaded connections, as clearly shown in Fig.15. The gear-Wheels F and F are provided outside of the ring F2 F3 witha series of cl utch-teethf2 f3, arranged to engage the clutch-teethformed upon the outer parts of the clutching-ring, the said teeth g2 g2being formed directly upon the sleeve, as clearly shown in the drawings.The clutch-teeth 2 3 are, however, for convenience of constructionformed on separate clutch-rings F4 F5, inserted in annular grooves orrecesses formed in theinner faces of the bevel gear- Wheels F F', saidrings F4 F having external screw-threads engaging screw-threads in theouter Walls of said recesses in the said bevelgears, as clearly seen inFig. 13. The clutchteeth on the clutch-sleeve, the gears, and the clutchmembers F2 and F3 are shown as made of triangular or ratchet shape tofacilitate the interlocking or engagement thereof, and the inner and outer series of teeth in such instance face oppositely or in differentdirections in order to secure the proper interlocking thereof, asclearly shown in Figs. 12 and I3.

From the construction above described it will be understood that whenthe clutchsleeve is moved into contact with the bevelgear F drivingconnection will be established between the said bevel-gear and the shaftB, while the bevel-gear F will be left free to turn upon the' adjacentend of the sleeve E, and it will also be understoodthat when the saidclutch-sleeve G is moved in the opposite direction and toward thebevel-gear F driving connection will be established between saidbevel-gear and the sleeve E, while the opposite bevel-gear F will befree to turn upon the shaft C.

The clutch device described affords a means of giving rotary motion atdifferent rates of speed to the shaft B, the said shaft B beingconnected by suitable intermediate driving mechanism with said shaft Cand wit-h the sleeve E, as will be hereinafter described.

Now describing the devices illustrated for actuating the shifting-leverH for the purpose of shifting the clutch-sleeve G, these parts are madeas follows: Said lever H is mounted on a vertical pivot-stud 7L and isprovided adjacent toits pivot with two oppositely-extending transverselever-arms 7L' 71,2, the rear or outer edges of which together have acurved contact or bearing surface h2. At the ends of said'arms 7171.2are located two detent-levers I I', which are engaged to swing onvertical pivots t t', which conveniently have the form of studs insertedin the frame and the arm D. The detent-levers I I are adapted to swingtoward and from the ends of the arms 71,' Wand are provided with notchesi212, which are adapted for engagement with the ends of said arms 7i h2,the shoulders at the inner ends of said notches being so arranged thatwhen the shoulder on one or the other of said detent-levers is engagedwith one of the said arms 71,' 7b2 of the shifting-lever theclutch-sleeve G will be held or locked at one limit or the other of itsmovement. The said detent-levers I I are held or thrown yieldinglytoward the arms 7i 7b2 by suitably-applied springs I2 I3. As hereinshown, the spring I2 is of spirally-coiled form and is engaged at oneend with a recessin the adjacent part of the machine-frame, so as tobear outwardly against the detent I, while the spring I2 is of leaf formand is attached at one end to the bracket I) and bears at its free endagainst the outer side of fthe detent-lever I.

J indicates an actuating-lever whichis pivotally mounted at one end on astud j in such manner as to swingin a vertical plane, with its free endadjacent to the transverse arms 7L' 71.2 of thelever H. Said lever Jcarries twolongitndinally-slidable plungers J J2, which are adapted toact against the arms 7L h2 and are provided with sp1ings,\vhich act onsaid plungers in a manner to throw them outward and keep them pressedconstantly against the said arms 71, 7b2. The points at which the saidplungers J J2 bear against the arms 71, 7t2are at such distance apartthat when one of the said plungers is acting at the outerend ofone ofthe arms the other plunger will bear against said arm adjacent to thepivot 7L. To avoid friction in the movement of said plunger along orover the bearing-surface 712 said plungers are provided withantifriction-rollersjj2. As a convenient construction of the parts theplungers J J2 are arranged to slide in a housing J5, attached to thelever J, and actuatingsprings J8 J4 are provided, which are made ofcoiled form and inserted within said housing between the inner ends ofsaid plungers IOO IIO

and screw-studs ji ji, which are inserted in the rear ends of thehousing and are adapted for adjustment to vary the tension of the saidsprings. In the operation of this part of the device oscillatorymovement is given to the lever J through the medium of any suitableactuating connection, which connection is not herein illustrated, itbeing understood that an actuating link or lever may be connected withthe stud jl, which projects upwardly from the top of the housing J5, orthat the said lever J may be moved by hand. The oscillatory movement ofsaid lever J is such as to carry the rollers j' or other projectingparts of or upon the lever J or plungers Jl J2 against or in contactwith the detent-levers I I at the termination of the-stroke of the leverJ in either direction. The parts are so arranged, moreover, that theactuatingsprings for the plungers Jl J2 will be normally undercompression, said springs being strong enough to throw or move theclutch-sleeve G to one limit or the other of its movement when thepressure of one of said springs is exerted on the end of one of the arms7L 7a2. It follows from the construction described that, assuming theclutch-sleeve to be at one limit of its movement and locked in suchposition by the engagement of one of the detent-levers, as I, with oneof the lever-arms, as h2, if the lever J be now swung' so as to carryitsfree end toward the opposite detent-lever as soon as the end of theplunger at the side of the said lever adjacent to such oppositedetent-lever comes in contact with the latter said detent-lever will bethrown outwardly free from the lever-arm engaged thereby, thus releasingsaid arm, and as soon as said lever is released the pressure of theplunger-sLn-ing throws the plunger outwardly, carrying with it theadjacent end of the lever-arm then engaged by it, with the result ofswinging the lever II to the opposite limit of its throw. When saidlever II reaches the opposite limit of its throw, the detent-lever, asI, which is engaged with the opposite lever-arm 7L', will come intoholdingengagement with said lever-arm, and thereby retain said lever Hfrom backward movement until by the return of the actuating-lever J itsadjacent plunger will release the engaged detent -lever and throwforward its associated lever-arm, thereby again shifting theclutch-sleeve backward to its original position. The same operation willobviously take place each time the operating-lever J is moved or thrown.

Now, referring to the change-speed gear constituting an important partof my invention, the same is made as follows: The sleeve E, whichsurrounds the shaft C, as before stated, has hearing in a stationary armor bracket "D2, and at its end which projects beyoud said bracket, atthe left-hand side of the same, it is provided with a gear-pinion E.Said gear-pinion intermeshes with a plurality of beveled gears K K,which are mounted on obliquely-arranged tubular bearing-studs K K',which are rigidly attached to or mounted on radial arms D3 D2, forming apart of the bracket D2, the said bearing-studs K being inclined in aplane or planes which pass through the central axis of the shaft C.Attached to the outer faces of the beveled gears K K are conicalfriction-rollers K2 K2, having smooth contact-faces, the outer surfacesof which, or those at the greatest distance from the shaft C, areparallel to the said shaft.

L is a friction-wheel, the peripheral part of 'which is cylindric andsurrounds the conical rollers K2 K2. Said wheel is mounted on a sleeveM, which sleeve surrounds the shaft C, between the sleeve E and thebearing D' of the said shaft. Said wheel is, moreover, provided with acentral hub L', through which the sleeve M passes and to which it isconnected bya spline and groove or thelikc, permitting the said wheel toslide endwise, but holding it from rotation on the sleeve. The hub ispreferably connected with the outer or cyliudric part of the wheelthrough the medium of an oblique or conical web L2. Said wheel isprovided adjacent to its open end with an inwardly-proj ecting frictionsurface or ring L2, which is adapted for contact with the cones K2 K2. Afriction-wheel and conical roller thus arranged together constitute afriction driving-gear adapted for var ing the speed of a driven part bymovement of the wheel or roller endwise with respect to the axis ofrotation of the wheel in such manner that the friction ring or surfaceof the wheel will be engaged with the larger or smaller or anyintermediate part of the conical roller.

So far as the general operation of the device is concerned thefriction-ring L3 may be formed or constructed in any manner to afford aninwardly-facing friction-surface on the wheel L for engagement with theconical friction-rollers K2-as, for instance, said ring may consistmerely of an inwardly-projecting rib on said wheel. As herein shown,however, and as a separate improvement, said friction-ring L2 is made ofa material different from that composing the Wheel and is preferablymade of paper, vulcanized fiber, leather, or like material. As hereinshown said ring consists of a number of layers or thin rings ofpaper,vulcanized tiber,orleather, which are inserted in a groove orrabbet Z, formed in the peripheral portion of the wheel L, and held insaid groove or rabbet by a clamping-ring Z', having screw-threadedengagement with the marginal part of the wheel.

As a further improvement I propose to make the conical friction-rollersK2 movable end wise on their bearings or pivots and to apply springsbetween said concs and their bearings or supports in such manner as toforce or press the rollers outwardly in a direction endwise of theiraxis of rotation, so that said rollers will be held by spring-pressurecon- ICO .ball-bearing.

-sprin g stantly in contact with the friction-ring of the wheel L. vAs astill further improvement I propose tor apply antifrictionroller-bearings between said conical rollers and their bearings in suchmanner as to take the end thrust of the rollers. To now describe indetail the construction illustrated in the said conical rollers andtheir bearings, these parts are made as follows: The bearing-stud K' ofeach roller is made hollow or tubular and has an exterior cylindricsurface in bearing contact with a cylindric axial bearing aperture inthe roller and in the bevel-gear K, which is attached to the base ofsaid roller. The bearing aperture on the roller is made so deep as toextend considerably beyond the extremities ofthe bearing-stud, andwithin the inner end of said bearing-aperture is located a bearing-ring7c, forming the external member of a Within the'end of the tubular studK is inserted an endwise-slidable spindle 7a2, which projects beyond thesaid stud and is provided on its projecting end with an annular bearingmember or cone 7c3, arranged in opposition to the outer annularbearingring k,which latter constitutes,in effect,a cup,antifriction-ballsku1 being interposed between the conicalbearing-surface 7c3 and the ring 7C. Said'spindle 7a2 is also preferablyprovided at its end with a reduced cylindric extension 7c, which entersa corresponding axial bearingaperture forming a continuation of thelarger bearing-aperture of the roller. In the inner end of the tubularbearing-stud K', which la-tter is inserted through its supporting-armD3, is inserted a screw-plug k6, and between said screw-plug and theinner end of the spindle 702 is interposed a coiled spring K3, whichacts by its expansion to force or thrust the spindle 7a2 outwardly, andthereby thrust or carry the conical roller outwardly upon itsbearingstud, with the result of pressing or holding it in contact withthe friction-ringl of the wheel L. The screw-plug 7c being adjustableendwise in the bearing-stud K by reason of its screw-threaded connectionwith the same affords a means of adjusting the tension of the K3 and ofthereby varying the pressure of the conical roller against the saidfriction-ring. The antifriction-bearing,arranged as described betweenthe conical roller and the endwise movable spindle 7a2, obviously takesthe end thrust of said spindle against the roller and lessens thefrictional resistance to the rotation of the roller, which is due to Ithe endwise pressure of the roller against said spindle.

The friction-wheel L, mounted to slide endf' wise but not to rotate uponthe shaft M, in connection with the conical friction-rollers K2,connected by the beveled gears with the sleeve E, as described,obviously constitute a change-speed gear through which motion iscommunicated from said sleeve E to the sleeve M. Said wheel L will bemoved or shifted endwise on the sleeve M so as to bring thefriction-ringLs in engagement with the larger or. smaller parts of thefriction-rollers, and thereby vary the speed of rotation of thefriction-wheel, by anysuitable actuating connection adapted foroperation by the hand or automatically by the machine in connection withwhich the device is used. In the particular construction illustrated thehub L' of the-said wheel is provided with a groove containing a ring L4,which is connected by means of a link L5 with an actuating-lever L6,which lever may be operated by any suitable actuating device formingpart of an automatic metalworking or other machine.

Now describing the driving connections between the main shaft C, thesleeve M, and the driven shaft B, these parts are constructed asfollows: Said driven shaft B is arranged at right angles with and atsome distance laterally from the shaft C, said shaftB being shown asjournaled at its end in a bracket D4, attached to the bearing D', inwhich latter the end of the shaft C is mounted. A short counter-shaft Nis arranged parallel with the end portion of the shaft C, the same beingmounted in a bearing-sleeve D4, which is rigidly attached to the bearingD'. The counter-shaft is driven from the shaft C by means of agear-wheel C', affixed to said shaft C, which intermeshes with agear-pinion N, affixed to the adjacent end of the counter-shaft N. Saidcounter-shaft N is arranged with its axis in the same plane with thedriven shaft B, and said driven shaft has affixed to it a beveled `gearB, which intermeshes with a bevel-gear N2 on the adjacent end of saidcounter-shaft N, whereby the shaft B receives motion from saidcounter-shaft. The shaft B also carries a worm-wheel O, whichintermeshes with a worm M on the sleeve M. Said worm-wheel Q is notattached to said shaft, but is adapted to turn thereon and has drivingconnection therewith through the medium of a sleeve P, which is keyed tosaid shaft B and is provided at its end adjacent to the worm-wheel withratChet-teethp,adapt ed for engagement with the free end of a pawl O',Figs. 7 and 10, which pawl is pivoted to the worm-wheel and engages saidratchetteeth p. The ypawl O is adapted to be moved or actuated by meanslof a spring-ring Q, which encircles the sleeve P in such manner as tohave frictional engagement therewith and is provided with anoutwardly-extendin g prong or arm q, which engages an aperture in alaterally-projecting lug 0 on the pawl O'. Said spring-ring Q by reasonof its frictional engagement with the sleeve P tends to turn with saidsleeve and the shaft B,and when said shaft is driven from the main shaftthrough the counter-shaft N the pressure of the arm q of said ring Q onthe pawl O will throw said pawl outwardly and hold it free from theratchet-teeth p, thereby enabling said shaft B to turn within theworm-wheel O without contact of the pawl with the ratchet-teeth so longas it is so driven or actuated by the shaft C. If, however, the shaft Mbe actuated IOO IIO

and the worin-wheel O be rotated therefrom through the medium of theworm M,the turning of said worm-wheel on the shaft B will bring pressureof the lug o against the springring Q in a direction to carry the freeend of the pawl into engagement with the ratchetteeth p, therebyinterlocking said wormwheel with said shaft D, after which the saidshaft D will be driven from the shaft M at a speed determined by therelative'proportion of the worm and the worm-wheel and by the positionof the friction-wheel L with respect to the friction-rollers IU.

The operation of the device as a whole will be understood from thefollowing: Vhen itis desired to drive the shaft B at a relatively highand constantspeed, as is required in an automatic machine for retractingthe cutting-tools from their work, the clutch-sleeve G is thrown towardthe bevel-gear F, so as to bring the clutch members or teeth thereon atonce into engagement with the clutch member F5 on the shaft C and theclutch-teeth on said bevel-wheel F. This is the position illustrated inseveral figures of the drawings. At this time the bevel-gear F will beengaged with the main shaft C, which will be then driven from thedriving-pulley A at a speed determined by the gearing connecting theseparts. The rotation of the shaft C will be transmitted to thecounter-shaft Nby the gearwheels connecting them, and the driven shaftwill be actuated from said counter-shaft by the bevel-gears N2 and B.When said shaft Bis so driven from the shaft C, it will be disconnectedfrom the worm-wheel O, as the ratchet-teeth will be free to turnforwardly with respect to the pawl O. Moreover, by reason of the actionof the spring Q said pawl will at this time be held free from saidratchet-teeth. lVhen it is desired to drive said shaft B in the samedirection at aslower and variable speed,the clutch-sleeve G will beshifted toward the bevel-gear F, with the result of rigidly connectingthe bevel-gear F Vwit-h the sleeve E, it being understood that previousto such movement said bevelgear was free to turn on the sleeve and thatafter the clutch-sleeve is thus moved or shifted the bevel-gear F willbe released from its connect-ion with the shaft C and will be free toturn thereon. lVhen the bevel-gear F is thus connected with the sleeveE, said sleeve will be rotated, thereby turning the pinion E and givingrotary motion to the conical friction-rollers K2. These rollers beingpressed against the friction-ring of the wheel L, said wheel willbedriven ata speed depending on the position of the frictionring withrespect to the ends of the rollers, the wheels L being driven moreslowly when the ring is in contact with the smaller ends of the rollersand more rapidly when in contact with the larger ends of said rollers.The rotary motion so given to said wheel L will be transmitted to thesleeve M and from said sleeve, by the worm and worm-wheel connectiondescribed, to said shaft B. It will of course be understood that saidshaft B will be driven from the worm-wheel through the action of thepawl O and that the shaft C will be turned or rotated through the actionof the gearing connecting it with said shaft l, although such rotationof the shaft C will have no eifect whatever upon the operation of theother parts through which the shaft B is at this time being driven.

I claim as my inventionl. Achange-speed gearembracingtwo gearwheels, anintermediate, endwise movable clutch-sleeve and means for operating..rsaid sleeve comprising an oscillating lever provided with twolever-arms, spring-actuated detent-arms engaging said lever-arms, and anoscillating actuating-lever for actuating the lever-arms anddetent-arms, said actuatinglever being provided with two spring-actuatedplungers which act on said lever-arms to give oscillatory movement tothe said lever.

2. A change-speed gear embracing a main shaft, a sleeve which turns onthe shaft, two bevel-gears, one of which turns on the shaft and theother on the said sleeve, clutch members on the said gear-wheels, clutchmembers on the said shaft and sleeve, an endwise-movable clutch-sleeveprovided at each end with tivo sets of clutch-teeth adapted for engagingthe clutch members on the shaft, sleeve and gear-wheels, and means foractuating said clutch-sleeve.

3. A change-speed gear embracing a rotative friction-wheel provided withan inwardlyfacing friction-ring, and a rotative, conical friction-rollerhaving its outer surface in contact with the said friction-ring, andparallel with the axis of rotation of the wheel; said wheel and frictionroller having .relative movement in the direction of the aXis ofrotation of said wheel.

4. A change-speed gear embracing a rotative friction-wheel provided withan inwardlyfacing friction-ring, a conical friction-roller having itsouter surface in contact with said ring, and power-transmittingconnections for the roller, embracing a gear-wheel mountedconcentrically with the axis of rotation of said wheel and havingdriving connection with the roller; said friction-wheel and the rollerhaving relative movement in the direction of the axis of rotation ofsaid friction-Wheel.

5. A change-speed gear embracing a rotative friction-wheel provided withan inwardlyfacing friction-ring, a conical friction-roller, a stationarypart provided with bearing-studs for said roller, a spring appliedbetween said stationary part and the roller tending to move the latterendwise in the direction to maintain its contact with saidfriction-ring, said part carrying said friction-roller and the saidfriction-wheel having relative movement in the direction of the axis ofrotation of said wheel.

6. A change-speed gear embracing a friction-wheel provided with aninwardly-facing IOO Iio

'friction-ring, a conical roller engaging said friction-ring, abearing-stud for the roller, said roller being movable endwise on saidbearing-stud, a roller-bearing for said roller embracing two annularparts or members one of which is movable endwise with respect to thesaid bearing-stud, and a .spring applied to said part of the bearingwhich is movably connected with the stud to move said part outwardlywith respect to the said bearingstud.

7. A change-speed gear embracing a rotative friction-wheel provided withan inwardlyfacing friction-ring, a rotative conical friction-roller,abearing-stud of tubular form for said friction-roller, an antifrictionroller-bearing comprising two annular parts one of which has the slidingengagement with the said bearing-stud, a screw-plug inserted in thevinner end of said bearing-stud, and a coiled spring inserted in saidtubular stud between said screw-plug and said sliding member of theball-bearing. f

8. A change-speed gear embracing a rotative friction-wheel provided withan inwardlyfacing friction-ring, a plurality of conical friction-rollersengaging said friction-ring, bearing-studs for said rollers, astationary part in which said studs are mounted, bevelgears attached tosaid friction-rollers, a gearpinion mounted in said stationary partconcentrically with the axis of rotation of said Wheel and intermeshingwith said bevel-gears, and a rotative part on which said frictionwheelismounted and with which it has endwise slidable but non-rotativeconnection.

9. v A change-speed gear embracing a main shaft, a sleeve thereon, twobevel-gears, one mounted to turn on the sleeve and the other on theshaft, clutch members one of which is attached to the shaft and theother to the said sleeve, clutch members attached to said bevel-gears,aslidable clutch-sleeve provided at each end with two clutch members,said clutch members being adapted for engagement with the clutch memberson the shaft,

sleeve and bevel-gears, a frictionwheelv mounted concentrically withsaid shaft and provided with an inwardly-facing frictionring, a conicalfriction-roller engaging said friction-ring, a bevel-gear attached tosaid conical roller,and a gear-pinion on said sleeve intermeshing withsaid bevel-gear on the conical roller.

lO. A change-speed gear embracing a main shaft, a sleeve thereon, twobevel-gears one turning on 'the shaft and the other on the sleeve, adrivingpinion intermeshing with saidbevel-gears, clutch members securedto the shaft and to the said sleeve, clutch members on the saidbevel-gears, a slidable clutchsleeve provided at each end with twoclutch members, said clutch members on the sleeve being adapted forengagement with the clutch members on the shaft, sleeve and bevel-gears,a rotative friction-wheel provided with an inwardly-facingfriction-ring, a conical friction-roller engaging said friction-ring, abearing-stud for said roller, a stationary support for said bearing-studthrough which said sleeve passes and which affords a bearing for thesame, a bevel-gear attached to said friction-roller, a gear-pinion onsaid sleeve intermeshing with said bevel-gear, a second sleeve on saidshaft with which said wheel has sliding but non-rotative engagement, ashaft to be driven and driving connections between said main shaft andsaid shaft to be driven and also between said second sleeve and saidshaft to bedriven.

ll. A change-speed gear embracing a main shaft, a shaft to be driven,two bevel-gears mounted on said shaft, a drivii'ig-pinion intermeshingwith said bevel-gears, a sleeve surrounding said shaft, a clutchmechanism for connecting one of said bevel-gears with the shaft and theother with said sleeve, a second sleeve on said shaft, a speed-changingdevice affording driving connection between said first and secondsleeves, gearing connecting said main shaft with the driven shaft, andgearing connecting said second sleeve with the drivenV shaft embracing apawl-and-ratchet connection.

l2. A change-speed gear embracing a main shaft, a shaft to be drivenarranged at right angles with the main shaft, two bevel-'gears mountedon said main shaft, a driving-pinion intermeshing with said bevel-gears,a sleeve surrounding said shaft, a clutch mechanism for connecting oneof said bevel-gears with the shaft and the other with the sleeve, asecond sleeve on said shaft, a speed-changing device affording drivingconnection be'- tween said first and .second sleeves, gearing connectingsaid main shaft with the driven shaft embracing a counter-shaft andbevelgears, and gearing connecting said second sleeve with the drivenshaft embracing a worm on said sleeve, a worm-wheel on the shaft and aratchet connection between said worm-wheel and said shaft.

13. The combination, with a main shaft, a sleeve thereon, a gear throughwhich said main shaft and sleeve are given rotary motion, acounter-shaft, gearing connecting the main shaft with the counter-shaft,a driven shaft at right angles to the main shaft, bevelgears connectingthe counter-shaft with the driven shaft, a worm on said sleeve, awormwheel mounted to turn on said driven shaft, and a pawl-and-ratchetAconnection between said worin-wheel and said driven shaft.

In testimony that I claim the foregoing as my invention I affix mysignature, in presence of two witnesses, this 21st day of August, A. D.1899.

osoR NoRLiNe.

i Witnesses:

W. A. HEMING, J. H. ABERCROMBIE.

ICO

IIO

